Crystalline carbon structure, method of manufacturing the same, and energy storage device having the same

Abstract

Provided are a carbon structure, a method of manufacturing the carbon structure, and an energy storage device having the carbon structure. According to the method of manufacturing the carbon structure, a reaction solution containing a catalyst and an organic solvent containing an aromatic compound is provided. Plasma is generated in the reaction solution, thereby forming a crystalline carbon structure.

What is claimed is: 
     
       1. A method of preparing carbon nanoparticles, comprising:
 mixing a metallocene compound and an aromatic compound to provide a liquid mixture, wherein the aromatic compound is at least one selected from the group consisting of benzene, biphenyl, naphthalene and anthracene; 
 applying plasma discharges to the liquid mixture while the liquid mixture is at or about a temperature of a boiling point of the aromatic compound, which causes chemical reactions in the liquid mixture to produce carbon nanoparticles having linear crystalline phases; and 
 collecting the carbon nanoparticles having linear crystalline phases. 
 
     
     
       2. The method according to  claim 1 , wherein applying plasma discharges is performed while at least one electrode is immersed in the liquid mixture. 
     
     
       3. The method according to  claim 1 , wherein the liquid mixture further comprises at least one sulfur-containing compound. 
     
     
       4. The method according to  claim 3 , wherein the metallocene compound comprises ferrocene, and the sulfur-containing compound comprises thiophene. 
     
     
       5. The method according to  claim 1 , wherein the metallocene compound is at least one selected from the group consisting of ferrocene, nickelocene, cobaltocene, and ruthenocene. 
     
     
       6. The method according to  claim 1 , wherein the metallocene compound is contained in the liquid mixture at 1 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound. 
     
     
       7. The method according to  claim 1 , wherein the metallocene compound is contained in the liquid mixture at 2 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound. 
     
     
       8. The method according to  claim 1 , wherein the metallocene compound is contained in the liquid mixture at 5 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound. 
     
     
       9. The method according to  claim 3 , wherein the sulfur-containing compound is at least one selected from the group consisting of thiophene, dibenzothiophene, diphenyldisulfide, hydrogen sulfide, diallyl sulfide, and allyl methyl sulfide. 
     
     
       10. The method according to  claim 9 , wherein the sulfur-containing compound is contained in the liquid mixture at 1 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound. 
     
     
       11. The method according to  claim 1 , wherein the liquid mixture further includes distilled water. 
     
     
       12. The method according to  claim 1 , wherein the aromatic compound comprises benzene and the liquid mixture is maintained at or about the boiling point of benzene when applying the plasma discharges. 
     
     
       13. A method of preparing carbon nanoparticles, comprising:
 mixing a metallocene compound and an aromatic compound to provide a liquid mixture, wherein the aromatic compound is at least one selected from the group consisting of benzene, biphenyl, naphthalene and anthracene; 
 immersing at least one electrode in the liquid mixture; and 
 generating plasma discharge in the liquid mixture via the at least one electrode immersed therein, which causes chemical reactions in the liquid mixture to produce carbon nanoparticles having linear crystalline phases; and 
 collecting the carbon nanoparticles having linear crystalline phases. 
 
     
     
       14. The method according to  claim 13 , wherein plasma discharges are generated in the liquid mixture at or about a temperature of a boiling point of the aromatic compound. 
     
     
       15. The method according to  claim 13 , wherein the liquid mixture further comprises at least one sulfur-containing compound selected from the group consisting of thiophene, dibenzothiophene, diphenyldisulfide, hydrogen sulfide, diallyl sulfide, and allyl methyl sulfide. 
     
     
       16. The method according to  claim 15 , wherein the metallocene compound comprises ferrocene, and the sulfur-containing compound comprises thiophene. 
     
     
       17. The method according to  claim 15 , wherein the aromatic compound comprises benzene, the metallocene compound comprises ferrocene, and the sulfur-containing compound comprises thiophene. 
     
     
       18. The method according to  claim 15 , wherein the sulfur-containing compound is contained in the liquid mixture at 1 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound. 
     
     
       19. The method according to  claim 13 , wherein the metallocene compound is at least one selected from the group consisting of ferrocene, nickelocene, cobaltocene, and ruthenocene. 
     
     
       20. The method according to  claim 13 , wherein the metallocene compound is contained in the liquid mixture at 1 to 10 parts by weight with respect to 100 parts by weight of the aromatic compound.